[Devel] Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory)

[Srivatsa Vaddagiri]

On Tue, Sep 12, 2006 at 03:06:35PM +0400, Pavel Emelianov wrote:
> Hmmm... Beancounters can provide this after trivial changes.

All that is needed is some interface to set a thread's BC id (which you
seem to have already - sys_set_bcid)

> We may schedule them in current set of "pending" features
> (http://wiki.openvz.org/UBC_discussion)
> 
> But this can create a kind of DoS within an application:
>   A thread continuously touches new and new pages to it's BC and
> these pages are get touched by other threads also. Sooner or later

Any good reason why threads will touch each other's working set?
Sure nothing prevents them from touching, but I would expect each thread
(serving a separate domain) to work on its own set of private pages?

> this BC will hit it's limit and reclaiming this set of pages would affect
> all the other threads.

-- 
Regards,
vatsa